1
- technical, chiefly Anatomy further back in position; of or nearer the rear or hind end, especially of the body or a part of it〈技〉【主剖】（位置）后的; （尤指身体）后部的, 尾部的：
the posterior part of the gut
肠子的根部
a basal body situated just posterior to the nucleus.
正位于细胞核后部的基体。ANTERIOR的反义词。
1.1
- Medicine relating to or denoting presentation of a fetus in which the rear or caudal end is nearest the cervix and emerges first at birth【医】倒胎的：
a posterior labour.
倒胎分娩。
2
- formal coming after in time or order; later〈正式〉之后的, 以后的：
a date posterior to the first Reform Bill.
第一个改革法案颁布之后的一天。
- humorous a person's buttocks〈幽默〉臀部, 屁股。
派生词
posteriority
nounposteriorly
adverb词源
early 16th cent. (as a plural noun denoting descendants)： from Latin, comparative of posterus 'following', from post 'after'.